diff --git a/api/types/types.go b/api/types/types.go
index eb5dfcd5ae..e52be89a93 100644
--- a/api/types/types.go
+++ b/api/types/types.go
@@ -19,9 +19,8 @@ import (
 
 // RootFS returns Image's RootFS description including the layer IDs.
 type RootFS struct {
-	Type      string
-	Layers    []string `json:",omitempty"`
-	BaseLayer string   `json:",omitempty"`
+	Type   string   `json:",omitempty"`
+	Layers []string `json:",omitempty"`
 }
 
 // ImageInspect contains response of Engine API: